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|
# frozen_string_literal: true
module HTTParty
class Request
class StreamingMultipartBody
NEWLINE = "\r\n"
CHUNK_SIZE = 64 * 1024 # 64 KB chunks
def initialize(parts, boundary)
@parts = parts
@boundary = boundary
@part_index = 0
@state = :header
@current_file = nil
@header_buffer = nil
@header_offset = 0
@footer_sent = false
end
def size
@size ||= calculate_size
end
def read(length = nil, outbuf = nil)
outbuf = outbuf ? outbuf.replace(''.b) : ''.b
return read_all(outbuf) if length.nil?
while outbuf.bytesize < length
chunk = read_chunk(length - outbuf.bytesize)
break if chunk.nil?
outbuf << chunk
end
outbuf.empty? ? nil : outbuf
end
def rewind
@part_index = 0
@state = :header
@current_file = nil
@header_buffer = nil
@header_offset = 0
@footer_sent = false
@parts.each do |_key, value, _is_file|
value.rewind if value.respond_to?(:rewind)
end
end
private
def read_all(outbuf)
while (chunk = read_chunk(CHUNK_SIZE))
outbuf << chunk
end
outbuf.empty? ? nil : outbuf
end
def read_chunk(max_length)
loop do
return nil if @part_index >= @parts.size && @footer_sent
if @part_index >= @parts.size
@footer_sent = true
return "--#{@boundary}--#{NEWLINE}".b
end
key, value, is_file = @parts[@part_index]
case @state
when :header
chunk = read_header_chunk(key, value, is_file, max_length)
return chunk if chunk
when :body
chunk = read_body_chunk(value, is_file, max_length)
return chunk if chunk
when :newline
@state = :header
@part_index += 1
return NEWLINE.b
end
end
end
def read_header_chunk(key, value, is_file, max_length)
if @header_buffer.nil?
@header_buffer = build_part_header(key, value, is_file)
@header_offset = 0
end
remaining = @header_buffer.bytesize - @header_offset
if remaining > 0
chunk_size = [remaining, max_length].min
chunk = @header_buffer.byteslice(@header_offset, chunk_size)
@header_offset += chunk_size
return chunk
end
@header_buffer = nil
@header_offset = 0
@state = :body
nil
end
def read_body_chunk(value, is_file, max_length)
if is_file
chunk = read_file_chunk(value, max_length)
if chunk
return chunk
else
@current_file = nil
@state = :newline
return nil
end
else
@state = :newline
return value.to_s.b
end
end
def read_file_chunk(file, max_length)
chunk_size = [max_length, CHUNK_SIZE].min
chunk = file.read(chunk_size)
return nil if chunk.nil?
chunk.force_encoding(Encoding::BINARY) if chunk.respond_to?(:force_encoding)
chunk
end
def build_part_header(key, value, is_file)
header = "--#{@boundary}#{NEWLINE}".b
header << %(Content-Disposition: form-data; name="#{key}").b
if is_file
header << %(; filename="#{file_name(value).gsub(/["\r\n]/, replacement_table)}").b
header << NEWLINE.b
header << "Content-Type: #{content_type(value)}#{NEWLINE}".b
else
header << NEWLINE.b
end
header << NEWLINE.b
header
end
def calculate_size
total = 0
@parts.each do |key, value, is_file|
total += build_part_header(key, value, is_file).bytesize
total += content_size(value, is_file)
total += NEWLINE.bytesize
end
total += "--#{@boundary}--#{NEWLINE}".bytesize
total
end
def content_size(value, is_file)
if is_file
if value.respond_to?(:size)
value.size
elsif value.respond_to?(:stat)
value.stat.size
else
value.read.bytesize.tap { value.rewind }
end
else
value.to_s.b.bytesize
end
end
def content_type(object)
return object.content_type if object.respond_to?(:content_type)
require 'mini_mime'
mime = MiniMime.lookup_by_filename(object.path)
mime ? mime.content_type : 'application/octet-stream'
end
def file_name(object)
object.respond_to?(:original_filename) ? object.original_filename : File.basename(object.path)
end
def replacement_table
@replacement_table ||= {
'"' => '%22',
"\r" => '%0D',
"\n" => '%0A'
}.freeze
end
end
end
end
|
